Efficient DC/DC converter provides two 15A outputs from a 3.3V backplane
David Chen
Abstract
The LTC1876, which can efficiently power low voltage DSPs, ASICs and FPGAs from a low input voltage, is described.
Keywords
DC/DC converter
3.3V bus
LTC1876
Introduction
The 3.3V DC bus has become popular for broadband networking systems, where it is tapped for a variety of lower voltages to power DSPs, ASICs and FPGAs. These lower voltages range from 1V to 2.5V and often require high load currents. To maintain high conversion efficiency, power MOSFET conduction losses from the step-down converters must be minimized. The problem is that the 3.3V bus also brings with it frequent use of sub-logic level MOSFETs. Such MOSFETs have a ...
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